Rikkert ten Klooster

Risk Advisory


Rikkert ten Klooster

Gustav Mahlerlaan 2970

For navigation: Gustav Mahlerlaan 3004

1081 LA Amsterdam


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Rikkert is a Manager at Deloitte Cyber Risk Services with over 6 years of experience as a security specialist and Red Teamer.

Rikkert is the product lead for Hackazon Deloitte’s platform for gamified learning. With the use of Hackazon Rikkert facilitates hands-on Security trainings and CTF (Security challenge based) competitions. He leads Deloitte’s global Hacky Holidays Capture the Flag competition. Hacky Holidays gives students and professionals from all over the world a fun learning experience, while competing for great prizes.

Rikkert performed APT (Advanced Persistent Threat) simulations for various clients in the Dutch government, public transport sector, financial sector and in the TMT Industry.

Rikkert was part of the Deloitte Cyberlympics team who won the competition in 2016 and 2017.

Rikkert has the OSCP certification from Offensive Security.

Rikkert ten Klooster